Put uncooked rice in a shallow baking dish. Sauté mushroom stems and pieces in 2 tablespoons of butter. Mix two soups and mushrooms together. Spoon this mixture over dry rice. Spoon the wine over this. Place the breasts in next. Sprinkle dry onion soup over breasts. Seal tightly with heavy duty foil and bake two hours in 325° oven. Do not open oven while baking.